1 Section of Neonatology, Kaohsiung Chang-Gung Memorial Hospital & Chang Gung University College of Medicine, Kaohsiung, 83301, Taiwan; Department of Early Childhood Care and Education, Cheng-Shiu University, Kaohsiung, 83301, Taiwan; School of Medicine, College of Medicine, National Sun Yat-sen University, Kaohsiung, 804201, Taiwan. Electronic address: charllysc2@gmail.com.