Cold type autoimmune hemolytic anemia- a rare manifestation of infectious mononucleosis; serum ferritin as an important biomarker oleh Chinthana Dematapitiya, Chiara Perera, Wajira Chinthaka, Solith Senanayaka, Deshani Tennakoon, Anfas Ameer, Dinesh Ranasinghe, Ushani Warriyapperuma, Suneth Weerarathna, Ravindra Satharasinghe