Comparative Efficacy of Intranasal, Intramuscular, and Intravenous Vitamin B12 Therapy for Hematological Recovery in Vitamin B12 Deficiency Anemia: A Randomized Controlled Trial. - Singh SK; Arora R; Pramanik SK; Kumar A; Singh A; Khanna S; Malhotra N; Juneja P; Upadhyay N; Yanamandra U (American journal of hematology, 2026)