1. Department of Pediatrics, Johns Hopkins Children’s Center, Baltimore, Maryland
2. Department of Pediatrics, University of Rochester Medical Center, Rochester, New York
3. Department of Pediatrics, Children’s Mercy Hospital, Kansas City, Missouri
4. Department of Pediatrics, Children’s Hospital at Dartmouth, Hanover, New Hampshire
5. Edward G. Miner Library, University of Rochester, Rochester, New York
6. Department of Pediatrics, Children’s Hospital and Medical Center, Omaha, Nebraska