Be able to comply with the requirements of the entire study. Able to understand and comply with protocol requirements for the entire length of the study Be able to comply with the requirements of the entire study. Ability to understand study procedures and to comply with them for the entire length of the study Be able to understand study procedures and comply with them for the entire length of the study period Ability to understand and comply with study procedures for the entire length of the study Ability to comply with study procedures for the entire length of the study Ability to understand study procedures and to comply with them for the entire length of the study Must be able to understand and comply with study procedures for the entire length of the study