AU - Barclay WR TI - HOrses PT - JOUR DP - 1980 TA - JAMA pages = {2442-2443}, VI - 243 IP - 23 AID - 10.1001/jama.1980.03300490060035 [doi] 4100 - http://dx.doi.org/10.1001/jama.1980.03300490060035 SO - JAMA June 20, 1980 243(23):2442