Higher Vitamin D Levels before Methotrexate Therapy Initiation Are Associated with Lower Subsequent Mortality in Patients with Rheumatoid Arthritis by Shahdi K. Malakooti, Hinnah Siddiqui, Brigid Wilson, Taissa Bej, Megan O’Mara, Alexandra Desotelle, Alyssa Lange, Carey L. Shive, Nora G. Singer, Grace A. McComsey, Lenche Kostadinova, Maya Mattar, David A. Zidar, Donald D. Anthony

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