Analysis of serum vitamin D and calcium levels in elderly patients with stable and unstable intertrochanteric fractures: A multi-center prospective study. by Kamran Alijanpour, Sina Afzal, Abolhasan Alijanpour, Hasan Barati, Hemmat Gholinia, Mehdi Tavassoli

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Does body mass index (BMI) significantly influence aseptic loosening in primary total knee arthroplasty? Insights from a long-term retrospective cohort study by Mohammad Ayati Firoozabadi, Amir Hossein Mafi, Sina Afzal, Shahabaldin Beheshti Fard, Homayoon Khaledian, Ali Bozorgsavoji, Sina Azadnajafabad, Seyed Mohammad Javad Mortazavi

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Evaluation of Active Intraoperative Nerve Monitoring in Severe Developmental Dysplasia of the Hip Patients Undergoing Total Hip Arthroplasty by Alireza Manafi Rasi, MD, Sina Afzal, Dr., MD, Mojtaba Baroutkoub, MD, Hasan Shakiba, MD, Pooya Kalani, MD, Mehdi Tavassoli, MD, Reza Zarei, MD

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