Prospective, randomized, double-blind study of prophylactic antibiotics in axillary lymph node dissection11This study was sponsored in part by a grant from SmithKline Beecham Labarotories. Cefonicid was provided by SmithKline Beecham Laboratories, and patients were not charged for the single preoperative dose of cefonicid or for any services associated with administration of the antibiotic or placebo.