Elucidation of anti-hyperglycemic activity of Psidium guajava L. leaves extract on streptozotocin induced neonatal diabetic Long-Evans rats oleh Md. Hafizur Rahman, Md. Asrafuzzaman, Md. Mahedi Hassan Tusher, M. Mosihuzzaman, Md Shahinul Haque Khan, Mohammad Shoeb, Begum Rokeya