Two year multicenter, randomized, double masked, placebo controlled parallel safety and efficacy study of 2% pirenzepins
ophthalmic gel in children with myopia: JAAPOS 2008;12(4):332-339
AND
Tan DT and others Asian Pirenzepine study group. One year multicenter, double masked, placebo controlled, parallel safety and efficacy study of 2% pirenzepine ophthalmic gel in children with myopia.