“MEDICAL COST AND OUT-OF-POCKET EXPENDITURE FOR PRETERM INFANTS: EVIDENCE FROM VIETNAM: Nguyen Thi Binh An1,2, Phuong Minh Hoang3, Phuc Huu Phan3, Peter van Eeuwijk1,2,4 and Günther Fink1,2”, SEATROPH, vol. 50, no. 6, p. 1155, Sep. 2020, Accessed: Apr. 27, 2026. [Online]. Available: https://journal.seameotropmednetwork.org/index.php/jtropmed/article/view/49