Before revision:  The proposed method is simple and cost effective , and has advantages over competing approaches such as not requiring patients to wear a device or needing dedicated sensors to measure gait . Furthermore, this method provides substantially more frequent estimates of gait velocity than are provided by other approaches .
After revision:  The proposed method is simple and cost effective , and has advantages over competing approaches such as : obtaining 20 to 100x more gait velocity measurements per day and offering the fusion of location-specific information with time stamped gait estimates. These advantages allow stable estimates of gait velocity than are provided by other approaches .