Ratchadawan Sooklim , Jadsada Thinkhamrop , Pisake Lumbiganon , Witoon Prasertcharoensuk , Jeerichuda Pattamadilok , Kanok Seekorn , Chompilas Chongsomchai , Prakai Pitak and Sukanya Chansamak
Reproductive Health 2007, 4:10doi:10.1186/1742-4755-4-10