Laboratory values on screening visit within: AST less than 40 units/liter, serum creatinine less than 1.5mg/dl; CPK less than 387, hemoglobin greater than 11.0 g/dL (females) or greater than 12.6 g/dL (males), platelets greater than 154,000/mm(3), total bilirubin less than or equal to 1.5 mg/d