Occipital Nerve Block Compared With Acetaminophen and Caffeine for Headache Treatment in Pregnancy: A Randomized Controlled Trial. - Bushman ET; Blanchard CT; Cozzi GD; Davis AM; Harper L; Robbins LS; Jones B; Szychowski JM; Digre KB; Casey BM; Tita AT; Sinkey RG (Obstetrics and gynecology, 2023)