Winiyakul N, Chaisiri K, Lumbiganon P, Chongsomchai C. The Antenatal Care Services at 12 District Hospitals in Khon Kaen. Thai J Obstet Gynaecol [internet]. 1998 Jun. 1 [cited 2026 Sep. 28];10(2):79-86. available from: https://he02.tci-thaijo.org/index.php/tjog/article/view/257075