Rueankhong, W., Suthutvoravut, S. and Tangthitiwong, J. (2018) “Factors Associated With the Use of Subdermal Etonogestrel Implants Among Postpartum Primipara Adolescents”, Ramathibodi Medical Journal, 41(1), pp. 9–16. doi: 10.14456/rmj.2018.2.