Gammal RS, Caudle KE, Quinn CT, Wang WC, Gaedigk A, Prows CA, Haidar CE, Taylor AK, Klein TE, Sangkuhl K, Hankins JS, Crews KR. The Case for Pharmacogenetics-Guided Prescribing of Codeine in Children. Clin Pharmacol Ther. 2019 06; 105(6):1300-1302.