Magnesium >= 1.4 mg/dL or at/above the lower limit of normal for the performing laboratory Magnesium above the institutional lower limit of normal (supplementation to meet this is allowed) Magnesium >= lower limit of normal Potassium, magnesium, phosphate must be corrected to at least lower limit of laboratory normal prior to start of treatment Serum calcium and magnesium above the institutional lower limit of normal, within 14 days of registration and within 7 days of the start of treatment Magnesium > 1.2 and < 2.5 mg/dL. Magnesium >= 0.9 mg/dL Magnesium >= the lower limit of normal Magnesium level between 1.8-2.9 mg Magnesium (triplet combination only) >= 1.8 mg/dL Magnesium >= the lower limit of normal Magnesium >= lower limit of normal (LLN) and =< ULN Magnesium >= lower limit of normal Magnesium above lower limit normal range for the institution; supplementation may be given before the first dose of study medication Magnesium >= the lower limit of normal Serum potassium and magnesium levels above the lower limit of normal Magnesium 1.6 – 2.6 mg/dL Serum magnesium >= the institutional lower limit of normal (supplementation of electrolytes prior to screening is allowed) Magnesium >= the lower limit of normal Magnesium >= the lower limit of normal for the institution Magnesium at or above lower limit of normal (correction with supplements is fine as long as the resultant level is at or above the lower limit of normal) Magnesium Magnesium (1.2 - ULN) Magnesium levels >= lower limit of normal Magnesium level >= lower limit of normal Magnesium >= 1.2mg/dL or 0.5 mmol/L Magnesium >= the lower limit of normal Magnesium less than 0.9 milligram per deciliter (mg/dL) Because of the potential risk of QTc changes, serum magnesium and phosphorous levels must be >= the institutional lower limit of normal Magnesium >= the lower limit of normal Magnesium >= lower limit of normal (=< 48 hours prior to registration) Magnesium >= the lower limit of normal Magnesium ? lower limit of normal (LLN) Magnesium >= 1.6 mg/dL Magnesium >= the lower limit of normal Serum magnesium >= 1.8 mg/dL