 Investigators may choose to house subjects during the interim days between specified in-patient clinic visits, either in the clinic or at an appropriate off-site facility such as a hotel or motel. Housing offers may be made to each subject population according to the respective Investigators judgment as to what is best for hisher patients. Such interim housing is not to be considered as study visits, but will be offered at the discretion of the Investigator to all subjects in hisher clinic, at hisher discretion, and simply to improve subject compliance and attempt to reduce variability. 