Köhli, P., Hambrecht, J., Zhu, J., Chiapparelli, E., Guven, A., Tsuchiya, K., . . . Hughes, A. Seasonal variations of preoperative vitamin D deficiency and secondary hyperparathyroidism before lumbar fusion surgery. Elsevier.
Chicago Style (17th ed.) CitationKöhli, P., et al. Seasonal Variations of Preoperative Vitamin D Deficiency and Secondary Hyperparathyroidism Before Lumbar Fusion Surgery. Elsevier.
MLA (9th ed.) CitationKöhli, P., et al. Seasonal Variations of Preoperative Vitamin D Deficiency and Secondary Hyperparathyroidism Before Lumbar Fusion Surgery. Elsevier.
Warning: These citations may not always be 100% accurate.