AUTHOR=Messina Roberta , Filippi Massimo TITLE=What We Gain From Machine Learning Studies in Headache Patients JOURNAL=Frontiers in Neurology VOLUME=11 YEAR=2020 URL=https://www.frontiersin.org/journals/neurology/articles/10.3389/fneur.2020.00221 DOI=10.3389/fneur.2020.00221 ISSN=1664-2295