TY - JOUR AU - Voss, TS; Elm, JJ; Wielinski, CL TI - Fall frequency and risk assessment in early Parkinson’s disease JO - Parkinsonism Relat Disord VL - 18 PY - 2012 DO - 10.1016/j.parkreldis.2012.04.004 L3 - PubMed-ID: 22542094 SP - 837 EP - 841 N1 - et al. ER -