Corrected calcium level >= lower limit of the institutional normal range Serum calcium and magnesium above the institutional lower limit of normal, within days of registration and within days of the start of treatment Unacceptable electrolyte values, including:\r\n* Potassium < . mmol/L despite supplementation, or elevated potassium above the CTCAE grade upper limit\r\n* Magnesium below the lower limit of normal range despite supplementation, or elevated magnesium above the CTCAE grade upper limit\r\n* Ionized calcium or corrected calcium values below the normal range or hypercalcemia above the CTCAE grade upper limit Serum phosphorus, calcium, magnesium and potassium >= lower limit of normal Calcium >= lower limit of normal Calcium >= lower limit of normal (=< hours prior to enrollment/randomization) Calcium >= lower limit of normal (=< hours prior to registration) Magnesium, potassium and calcium < the lower limit of normal per institution normal lab values Magnesium > the lower limit of normal per institution normal lab values Potassium > the lower limit of normal per institution normal lab values Calcium > the lower limit of normal per institution normal lab values Magnesium, potassium and calcium > the lower limit of normal per institution normal lab values Magnesium >= the lower limit of normal per institution normal lab values Potassium >= the lower limit of normal per institution normal lab values Calcium >= the lower limit of normal per institution normal lab values Magnesium, potassium and calcium > the lower limit of normal per institution normal lab values