title: Erratum to: Hyaluronic acid increases tendon derived cell viability and collagen type I expression in vitro: Comparative study of four different Hyaluronic acid preparations by molecular weight.
authors.affiliation: Unit of Arthoscopy and Sports Trauma Surgery, Hesperia Hospital, Modena, Italy. leonardoosti@yahoo.com.
authors.forename: Leonardo
authors.initials: L
authors.lastname: Osti
authors.affiliation: U.O.C. of Immunohaematology and Transfusion Medicine, Laboratory of Stem Cells, Spirito Santo Hospital, via Fonte Romana 8, Pescara, 65125, Italy.
authors.forename: Martina
authors.initials: M
authors.lastname: Berardocco
authors.affiliation: Department of Pharmacy, University G. d'Annunzio, Chieti, Italy.
authors.forename: Viviana
authors.initials: V
authors.lastname: di Giacomo
authors.affiliation: U.O.C. of Immunohaematology and Transfusion Medicine, Santo Spirito Hospital, Pescara, Italy.
authors.forename: Graziella
authors.initials: G
authors.lastname: Di Bernardo
authors.affiliation: Department of Orthopedics and Traumatology, University of Rome "Tor Vergata" School of Medicine, Rome, Italy.
authors.forename: Francesco
authors.initials: F
authors.lastname: Oliva
authors.affiliation: U.O.C. of Immunohaematology and Transfusion Medicine, Laboratory of Stem Cells, Spirito Santo Hospital, via Fonte Romana 8, Pescara, 65125, Italy. annacberardi@yahoo.it.
authors.forename: Anna C
authors.initials: AC
authors.lastname: Berardi