Author Details

Tobing, Tina Christina Lumban, <p><span lang="EN">Department of Pediatrics, Faculty of Medicine, </span><span lang="EN-US">Universitas Sumatera Utara</span></p><p>Department of Pediatrics, Adam Malik General Hospital, Medan</p><p><span lang="EN-US"><br /></span></p>, Indonesia



Department of Biology, Faculty of Mathematics and Natural Sciences

University of Sumatera Utara