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Reply to the letter: predicting sustained opioid prescription after spine surgery.
Karhade AV, Schwab JH.Spine J. 2019 Oct;19(10):1749. doi: 10.1016/j.spinee.2019.06.008.PMID: 31563340 
Physical Function and Quality of Life After Resection of Mobile Spine Chondrosarcoma.Paulino Pereira NR, Janssen SJ, Stoop N, Hartveldt S, Chen YE, DeLaney TF, Hornicek FJ, Schwab JH.Global Spine J. 2019 Oct;9(7):743-753. doi: 10.1177/2192568219830330. Epub 2019 Feb 18.PMID: 31552156 Free PMC article.
Predicting nonroutine discharge after elective spine surgery: external validation of machine learning algorithms.Stopa BM, Robertson FC, Karhade AV, Chua M, Broekman MLD, Schwab JH, Smith TR, Gormley WB.J Neurosurg Spine. 2019 Jul 26:1-6. doi: 10.3171/2019.5.SPINE1987. Online ahead of print.PMID: 31349223
Development of Machine Learning Algorithms for Prediction of Sustained Postoperative Opioid Prescriptions After Total Hip Arthroplasty.Karhade AV, Schwab JH, Bedair HS.J Arthroplasty. 2019 Oct;34(10):2272-2277.e1. doi: 10.1016/j.arth.2019.06.013. Epub 2019 Jun 13.PMID: 31327647
Prognostic models for spinal metastatic disease: evolution of methodologies, limitations, and future opportunities.Karhade AV, Shin JH, Schwab JH.Ann Transl Med. 2019 May;7(10):219. doi: 10.21037/atm.2019.04.87.PMID: 31297384 Free PMC article. Review.
Development of machine learning algorithms for prediction of mortality in spinal epidural abscess.Karhade AV, Shah AA, Bono CM, Ferrone ML, Nelson SB, Schoenfeld AJ, Harris MB, Schwab JH.Spine J. 2019 Dec;19(12):1950-1959. doi: 10.1016/j.spinee.2019.06.024. Epub 2019 Jun 27.PMID: 31255788
Development of machine learning algorithms for prediction of prolonged opioid prescription after surgery for lumbar disc herniation.Karhade AV, Ogink PT, Thio QCBS, Cha TD, Gormley WB, Hershman SH, Smith TR, Mao J, Schoenfeld AJ, Bono CM, Schwab JH.Spine J. 2019 Nov;19(11):1764-1771. doi: 10.1016/j.spinee.2019.06.002. Epub 2019 Jun 9.PMID: 31185292
Physical function and pain intensity in patients with metastatic bone disease.Janssen SJ, Pereira NRP, Thio QCBS, Raskin KA, Bramer JAM, Lozano-Calderon SA, Schwab JH.J Surg Oncol. 2019 Sep;120(3):376-381. doi: 10.1002/jso.25510. Epub 2019 May 29.PMID: 31140605
High Risk of Symptomatic Venous Thromboembolism After Surgery for Spine Metastatic Bone Lesions: A Retrospective Study.Groot OQ, Ogink PT, Paulino Pereira NR, Ferrone ML, Harris MB, Lozano-Calderon SA, Schoenfeld AJ, Schwab JH.Clin Orthop Relat Res. 2019 Jul;477(7):1674-1686. doi: 10.1097/CORR.0000000000000733.PMID: 31135550 Free PMC article.
Sagittal spinal parameters after en bloc resection of mobile spine tumors.Massier JRA, Ogink PT, Schlösser TPC, Ferrone ML, Hershman SH, Cha TD, Shin JH, Schwab JH.Spine J. 2019 Oct;19(10):1606-1612. doi: 10.1016/j.spinee.2019.05.012. Epub 2019 May 21.PMID: 31125699
Does the SORG Algorithm Predict 5-year Survival in Patients with Chondrosarcoma? An External Validation.Bongers MER, Thio QCBS, Karhade AV, Stor ML, Raskin KA, Lozano Calderon SA, DeLaney TF, Ferrone ML, Schwab JH.Clin Orthop Relat Res. 2019 Oct;477(10):2296-2303. doi: 10.1097/CORR.0000000000000748.PMID: 31107338 Free PMC article.
Radiation-induced and neurofibromatosis-associated malignant peripheral nerve sheath tumors (MPNST) have worse outcomes than sporadic MPNST.Miao R, Wang H, Jacobson A, Lietz AP, Choy E, Raskin KA, Schwab JH, Deshpande V, Nielsen GP, DeLaney TF, Cote GM, Hornicek FJ, Chen YE.Radiother Oncol. 2019 Aug;137:61-70. doi: 10.1016/j.radonc.2019.03.015. Epub 2019 May 9.PMID: 31078939
Validating the Stopping Opioids after Surgery (SOS) score for sustained postoperative prescription opioid use in spine surgical patients.Karhade AV, Chaudhary MA, Bono CM, Kang JD, Schwab JH, Schoenfeld AJ.Spine J. 2019 Oct;19(10):1666-1671. doi: 10.1016/j.spinee.2019.05.001. Epub 2019 May 9.PMID: 31078697
Development of a machine learning algorithm for prediction of failure of nonoperative management in spinal epidural abscess.Shah AA, Karhade AV, Bono CM, Harris MB, Nelson SB, Schwab JH.Spine J. 2019 Oct;19(10):1657-1665. doi: 10.1016/j.spinee.2019.04.022. Epub 2019 May 4.PMID: 31059819
Prognosticating outcomes and survival for patients with lumbar spinal metastases: Results of a bayesian regression analysis.Schoenfeld AJ, Ferrone ML, Schwab JH, Blucher JA, Barton LB, Harris MB, Kang JD.Clin Neurol Neurosurg. 2019 Jun;181:98-103. doi: 10.1016/j.clineuro.2019.04.009. Epub 2019 Apr 22.PMID: 31029015 Free PMC article.
Ambulatory status after surgical and nonsurgical treatment for spinal metastasis.Schoenfeld AJ, Losina E, Ferrone ML, Schwab JH, Chi JH, Blucher JA, Silva GS, Chen AT, Harris MB, Kang JD, Katz JN.Cancer. 2019 Aug 1;125(15):2631-2637. doi: 10.1002/cncr.32140. Epub 2019 Apr 15.PMID: 30985913 Free PMC article.
Predicting discharge placement after elective surgery for lumbar spinal stenosis using machine learning methods.Ogink PT, Karhade AV, Thio QCBS, Gormley WB, Oner FC, Verlaan JJ, Schwab JH.Eur Spine J. 2019 Jun;28(6):1433-1440. doi: 10.1007/s00586-019-05928-z. Epub 2019 Apr 2.PMID: 30941521
Development of a machine learning algorithm predicting discharge placement after surgery for spondylolisthesis.Ogink PT, Karhade AV, Thio QCBS, Hershman SH, Cha TD, Bono CM, Schwab JH.Eur Spine J. 2019 Aug;28(8):1775-1782. doi: 10.1007/s00586-019-05936-z. Epub 2019 Mar 27.PMID: 30919114
Predicting 90-Day and 1-Year Mortality in Spinal Metastatic Disease: Development and Internal Validation.Karhade AV, Thio QCBS, Ogink PT, Bono CM, Ferrone ML, Oh KS, Saylor PJ, Schoenfeld AJ, Shin JH, Harris MB, Schwab JH.Neurosurgery. 2019 Oct 1;85(4):E671-E681. doi: 10.1093/neuros/nyz070.PMID: 30869143
Prognostic value of serum alkaline phosphatase in spinal metastatic disease.Karhade AV, Thio QCBS, Kuverji M, Ogink PT, Ferrone ML, Schwab JH.Br J Cancer. 2019 Mar;120(6):640-646. doi: 10.1038/s41416-019-0407-8. Epub 2019 Feb 22.PMID: 30792532 
Neutrophil to lymphocyte ratio and mortality in spinal epidural abscess.Karhade AV, Shah KC, Shah AA, Ogink PT, Nelson SB, Schwab JH.Spine J. 2019 Jul;19(7):1180-1185. doi: 10.1016/j.spinee.2019.02.005. Epub 2019 Feb 11.PMID: 30763714
Low dose radiotherapy is associated with local complications but not disease control in sacral chordoma.Houdek MT, Rose PS, Hevesi M, Schwab JH, Griffin AM, Healey JH, Petersen IA, DeLaney TF, Chung PW, Yaszemski MJ, Wunder JS, Hornicek FJ, Boland PJ, Sim FH, Ferguson PC; Other Members of the Sacral Tumor Society.J Surg Oncol. 2019 Jun;119(7):856-863. doi: 10.1002/jso.25399. Epub 2019 Feb 7.PMID: 30734292 
Machine learning for prediction of sustained opioid prescription after anterior cervical discectomy and fusion.Karhade AV, Ogink PT, Thio QCBS, Broekman MLD, Cha TD, Hershman SH, Mao J, Peul WC, Schoenfeld AJ, Bono CM, Schwab JH.Spine J. 2019 Jun;19(6):976-983. doi: 10.1016/j.spinee.2019.01.009. Epub 2019 Jan 30.PMID: 30710731
Allograft reconstruction of the humerus: Complications and revision surgery.Ogink PT, Teunissen FR, Massier JR, Raskin KA, Schwab JH, Lozano-Calderon SA.J Surg Oncol. 2019 Mar;119(3):329-335. doi: 10.1002/jso.25309. Epub 2018 Dec 5.PMID: 30517776
Albumin and Spinal Epidural Abscess: Derivation and Validation in Two Independent Data Sets.Karhade AV, Shah AA, Lin KY, Ogink PT, Shah KC, Nelson SB, Schwab JH.World Neurosurg. 2019 Mar;123:e416-e426. doi: 10.1016/j.wneu.2018.11.182. Epub 2018 Nov 27.PMID: 30500590
Development of Machine Learning Algorithms for Prediction of 30-Day Mortality After Surgery for Spinal Metastasis.Karhade AV, Thio QCBS, Ogink PT, Shah AA, Bono CM, Oh KS, Saylor PJ, Schoenfeld AJ, Shin JH, Harris MB, Schwab JH.Neurosurgery. 2019 Jul 1;85(1):E83-E91. doi: 10.1093/neuros/nyy469.PMID: 30476188
Outcome after reconstruction of proximal femoral tumors: A systematic review.Janssen SJ, Langerhuizen DWG, Schwab JH, Bramer JAM.J Surg Oncol. 2019 Jan;119(1):120-129. doi: 10.1002/jso.25297. Epub 2018 Nov 22.PMID: 30466190
A Classification System for Spinal Cord Compression and its Association With Neurological Deficit in Spinal Epidural Abscess.Shah AA, Yang H, Harris MB, Schwab JH.Clin Spine Surg. 2019 Apr;32(3):E126-E132. doi: 10.1097/BSD.0000000000000746.PMID: 30451783
Sacral chordoma: a clinical review of 101 cases with 30-year experience in a single institution.
van Wulfften Palthe ODR, Tromp I, Ferreira A, Fiore A, Bramer JAM, van Dijk NC, DeLaney TF, Schwab JH, Hornicek FJ.Spine J. 2019 May;19(5):869-879. doi: 10.1016/j.spinee.2018.11.002. Epub 2018 Nov 14.PMID: 30445184
Practice Variation Among Surgeons Treating Lumbar Spinal Stenosis in a Single Institution.
Ogink PT, van Wulfften Palthe O, Teunis T, Bono CM, Harris MB, Schwab JH, Cha TD.Spine (Phila Pa 1976). 2019 Apr 1;44(7):510-516. doi: 10.1097/BRS.0000000000002859.PMID: 30234813
Fungal spinal epidural abscess: a case series of nine patients.
Yang H, Shah AA, Nelson SB, Schwab JH.Spine J. 2019 Mar;19(3):516-522. doi: 10.1016/j.spinee.2018.08.001. Epub 2018 Aug 16.PMID: 30121322
Complications and reoperations after surgery for 647 patients with spine metastatic disease.Paulino Pereira NR, Ogink PT, Groot OQ, Ferrone ML, Hornicek FJ, van Dijk CN, Bramer JAM, Schwab JH.Spine J. 2019 Jan;19(1):144-156. doi: 10.1016/j.spinee.2018.05.037. Epub 2018 Jun 1.PMID: 29864546