TY JOUR TI USING BIODEGRADABLE SCREWS IN TREATMENT OF HALLUX VALGUS KW hallux valgus KW biodegradable screws KW PLGA KW PASA JO Acta biomedica scientifica AU Leonova, S.N. AU Usoltsev, I.V. PY 2016 IS 1 PB Scientific Center for Family Problems and Human Reproduction