Wanna Kongvivegkachornkij. (1999) Comparison between the effect of normal saline solution and heparin in normal saline solution on blood clotting, phlebitis and maintaining time of PIID in pediatric patients. Mahidol University,:ม.ป.ท.Wanna Kongvivegkachornkij. 1999. Comparison between the effect of normal saline solution and heparin in normal saline solution on blood clotting, phlebitis and maintaining time of PIID in pediatric patients. ม.ป.ท.:Mahidol University,;Wanna Kongvivegkachornkij. Comparison between the effect of normal saline solution and heparin in normal saline solution on blood clotting, phlebitis and maintaining time of PIID in pediatric patients. ม.ป.ท.:Mahidol University, 1999. Print.