Editorial

References 

1. Burrows GN, Ferris TF. Medical Complications During Pregnancy. (ed 3). Philadelphia, PA: WB Saunders; 1988;
2. Briggs GC, Freeman RK, Yaffe SJ. Drugs in Pregancy and Lactation: A Reference Guide to Fetal and Neonatal Risk. (ed 2). Baltimore, MD: Williams & Wilkins; 1986;