Non-respondents do not bias outcome assessment after cervical spine surgery: a multicenter observational study from the Norwegian registry for spine surgery (NORspine)

por Ingebrigtsen, Tor, Aune, Grethe, Karlsen, Martine Eriksen, Gulati, Sasha, Kolstad, Frode, Nygaard, Øystein P., Thyrhaug, Anette Moltu, Solberg, Tore K.
Publicado 2022