RT Journal Article SR Electronic T1 Patent foramen ovale and migraine JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP S114 OP S117 VO 74 IS 2 suppl 1 A1 Penn, Marc S. A1 Young, James B. A1 Hahn, Joseph F. A1 Anzola, Gian Paolo YR 2007 UL http://www.ccjm.org/content/74/2_suppl_1/S114.abstract AB