PT - JOURNAL ARTICLE ED - , TI - Iron deposition in periaqueductal gray matter as a potential biomarker for chronic migraine AID - 10.1212/WNL.0000000000007921 DP - 2019 Sep 24 TA - Neurology PG - 608--608 VI - 93 IP - 13 4099 - http://n.neurology.org/content/93/13/608.4.short 4100 - http://n.neurology.org/content/93/13/608.4.full SO - Neurology2019 Sep 24; 93