Author Contribution
RS, MP
All authors were involved in the design of the study protocol. MG is the coordinating researcher, the main writer of the manuscript, involved in the data collection and training of the intervention group. RM was a major contributor in writing the manuscript and data collection, and involved in training of the intervention group. RS provided input for the writing of the manuscript and was involved in training of the intervention group. MP provided input for the writing of the manuscript and was the study doctor. RdB, KM and AL supervised the study and provided input for writing the manuscript. All authors read and approved the final manuscript.