Panjachat Ratanamongkol และ Sungkom Jongpiputvanich. (2008) A randomized controlled trial of polyethylene glycol 4000 without electrolytes versus milk of magnesia for the treatment of functional constipation in infants and young children. Chulalongkorn University:ม.ป.ท.Panjachat Ratanamongkol และ Sungkom Jongpiputvanich. 2008. A randomized controlled trial of polyethylene glycol 4000 without electrolytes versus milk of magnesia for the treatment of functional constipation in infants and young children. ม.ป.ท.:Chulalongkorn University;Panjachat Ratanamongkol และ Sungkom Jongpiputvanich. A randomized controlled trial of polyethylene glycol 4000 without electrolytes versus milk of magnesia for the treatment of functional constipation in infants and young children. ม.ป.ท.:Chulalongkorn University, 2008. Print.