Updates are available Erratum dated 2017-07-12
Click to view Erratum: https://doi.org/10.1186/s10194-017-0771-9
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Authors
Gagliardi, Stella http://orcid.org/0000-0002-6589-6907
Grieco, Gaetano Salvatore
Gualandi, Francesca
Caniatti, Luisa Maria
Groppo, Elisabetta
Valente, Marialuisa
Nappi, Giuseppe
Neri, Marcella
Cereda, Cristina
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