Hameed, Dr Maria, Mudassar Zia, Muniza Qayyum, Hijab Hameed, Riffat Yasmin, and Shabab Zahra. 2023. “The Association Between Rheumatoid Arthritis and Serum Levels of Vitamin D”. Esculapio Journal of SIMS 19 (3). Pakistan:269-72. https://doi.org/10.51273/esc23.25131931.