Prevalence of Headache and Migraine in Schoolchildren
BMJ 309:765-769, Abu-Arefeh,I.&Russell,G., 1994
Prevalence of Migraine Headache in the United States, Relation to Age, Income, Race & Other Sociodemographic Factors
JAMA 267:64-69, Stewart,W.F.,et al, 1992
Undiagnosed Migraine Headaches
Arch Int Med 152:1273-1278, Lipton,R.B.,et al, 1992