Mustafa Suphi Elbistanlı; Selçuk Güneş; Yakup Yegin; Mustafa Çelik; Hasan Emre Koçak; Cenk Evren; Fatma Tülin Kayhan. Relationship Between Serum Vitamin D Levels and Childhood Recurrent Tonsillitis. OOJ 2017, 3, 16-21.