Characteristics and Gender Differences of Headache in the Veterans Health Administration: A National Cohort Study, Fiscal Year 2008-2019.

Sico JJ, Seng E, Wang K, Skanderson M, Schindler EA, Ney JP, Lorenze N, Kimber A, Lindsey H, Grinberg AS, Kuruvilla D, Higgins DJ, Graham G, Sandbrink F, Scholten J, Shapiro RE, Lipton RB, Fenton B.