Balance evaluation and proprioceptive training on ballerinas - Part I: questionnaire design and proprioceptive training program for ballet dancers. - D'Ingianna, Lucia; Grazie, Miriana Delle; Aconstantinesei, Mihaela; Vasilescu, Mirela; Foti, Calogero; Rosulescu, Eugenia (Sports Medicine Journal / Medicina Sportiva, 2017)