TY - RPRT TI - Headache types and panic disorder: directionality and specificity. AU - N Breslau AU - L R Schultz AU - W F Stewart AU - R Lipton AU - K M Welch PY - 2001 DO - 10.1212/wnl.56.3.350 UR - https://pubmed.ncbi.nlm.nih.gov/11171900/ ID - 11171900 ER -