Comparing the effect of a herbal-based laxative (Goleghand®) and polyethylene glycol on functional constipation among children: A randomized controlled trial oleh Hosein Saneian, Saeedeh Ghaedi, Fatemeh Famouri, Majid Khademian, Najmeh Ahmadi, Mohammadreza Memarzadeh, Somayeh Sadeghi, Peiman Nasri