 - Medical history or physical examination findings; clinically significant cardiovascular, respiratory, hepatic, neurologic, endocrine, psychiatric, or other major systemic disease; or laboratory or electrocardiograph abnormality making implementation of the protocol or interpretation of the protocol results difficult. Abnormalities which are not clinically significant will not necessarily disqualify subjects provided, in the opinion of the investigator and sponsor, the study validity or the subjects welfare is not compromised. 