Headache and PregnancyThe Neurologist 14:108-119, Menon,R. &Bushnell,C.D., 2008
Anticoagulation for Chronic Atrial FibrillationJAMA 283:2901-2903, Stern,S.,et al, 2000
Headaches in PregnancySemin Neurol 8:187-192, Reik,L., 1988