Creatinine clearance or radioisotope glomerular filtration rate (GFR) >= 60 ml/min/1.73 m^2 or a normal serum creatinine based on age described in the table below:* Age: =< 5 years; maximum serum creatinine: 0.8 mg/dL* Age: 5 < age =< 10 years; maximum serum creatinine: 1.0 mg/dL* Age: 10 < age =< 15 years; maximum serum creatinine: 1.2 mg/dL* Age: > 15 years; maximum serum creatinine: 1.5 mg/dLXx_NEWLINE_xXCreatinine clearance or radioisotope glomerular filtration rate (GFR) >= 70 mL/min/1.73 m^2 or a serum creatinine based on age/gender as follows:* Age: 11 to < 13 years old; 1.2 (male, female) maximum serum creatinine (mg/dL)* Age: 13 to < 16 years old; 1.5 (male), 1.4 (female) maximum serum creatinine (mg/dL)* Age: >= 16 years old; 1.7 (male), 1.4 (female) maximum serum creatinine (mg/dL)Xx_NEWLINE_xXCreatinine clearance or radioisotope glomerular filtration rate (GFR) >= 70 mL/min/1.73 m^2 or a serum creatinine based on age/gender as follows:* 2 to < 6 years of age** Male and female: 0.8 (maximum serum creatinine [mg/dL])* 6 to < 10 years of age** Male and female: 1 (maximum serum creatinine [mg/dL])* 10 to < 13 years of age** Male and female: 1.2 (maximum serum creatinine [mg/dL])* 13 to < 16 years of age** Male 1.5 (maximum serum creatinine [mg/dL])** Female: 1.4 (maximum serum creatinine [mg/dL])* >= 16 years of age** Male: 1.7 (maximum serum creatinine [mg/dL])** Female: 1.4 (maximum serum creatinine [mg/dL])Xx_NEWLINE_xXA serum creatinine based on age/gender as follows:* 1 to < 2 years: maximum serum creatinine 0.6 mg/dL (both male and female)* 2 to < 6 years: maximum serum creatinine 0.8 mg/dL (both male and female)* 6 to < 10 years: maximum serum creatinine 1 mg/dL (both male and female)* 10 to < 13 years: maximum serum creatinine 1.2 mg/dL (both male and female)* 13 to < 16 years: maximum serum creatinine 1.5 mg/dL (male), 1.4 mg/dL (female)* >= 16 years: maximum serum creatinine 1.7 mg/dL (male), 1.4 mg/dL (female)Xx_NEWLINE_xXSerum creatinine within normal limits based on age/gender, as follows:* 1 to < 2 years: maximum serum creatinine 0.6 mg/dL (both male and female)* 2 to < 6 years: maximum serum creatinine 0.8 mg/dL (both male and female)* 6 to < 10 years: maximum serum creatinine 1 mg/dL (both male and female)* 10 to < 13 years: maximum serum creatinine 1.2 mg/dL (both male and female)* 13 to < 16 years: maximum serum creatinine 1.5 mg/dL (male), 1.4 mg/dL (female)* >= 16 years: maximum serum creatinine 1.7 mg/dL (male), 1.4 mg/dL (female)Xx_NEWLINE_xXA serum creatinine based on age/gender as follows:* Age 1 to < 2 years: maximum serum creatinine 0.6 mg/dL for male and 0.6 mg/dL for female* Age 2 to < 6 years: maximum serum creatinine 0.8 mg/dL for male and 0.8 mg/dL for female* Age 6 to < 10 years: maximum serum creatinine 1 mg/dL for male and 1 mg/dL for female* Age 10 to < 13 years: maximum serum creatinine 1.2 mg/dL for male and 1.2 mg/dL for female* Age 13 to < 16 years: maximum serum creatinine 1.5 mg/dL for male and 1.4 mg/dL for female* Age >= 16 years: maximum serum creatinine 1.7 mg/dL for male and 1.4 mg/dL for femaleXx_NEWLINE_xXA serum creatinine based on age/gender as follows:* Age 1 to < 2 years: maximum serum creatinine 0.6 mg/dL for male and 0.6 mg/dL for female* Age 2 to < 6 years: maximum serum creatinine 0.8 mg/dL for male and 0.8 mg/dL for female* Age 6 to < 10 years: maximum serum creatinine 1 mg/dL for male and 1 mg/dL for female* Age 10 to < 13 years: maximum serum creatinine 1.2 mg/dL for male and 1.2 mg/dL for female* Age 13 to < 16 years: maximum serum creatinine 1.5 mg/dL for male and 1.4 mg/dL for female* Age >= 16 years: maximum serum creatinine 1.7 mg/dL for male and 1.4 mg/dL for femaleXx_NEWLINE_xXCreatinine clearance or radioisotope glomerular filtration rate (GFR) >= 70 ml/min/1.73 m^2 or a serum creatinine based on age/gender as follows:* Age: 1 to < 2 years; maximum serum creatinine (mg/dL): male 0.6; female 0.6* Age: 2 to < 6 years; maximum serum creatinine (mg/dL): male 0.8; female 0.8* Age: 6 to < 10 years; maximum serum creatinine (mg/dL): male 1; female 1* Age: 10 to < 13 years; maximum serum creatinine (mg/dL): male 1.2; female 1.2* Age: 13 to < 16 years; maximum serum creatinine (mg/dL): male 1.5; female 1.4* Age: >= 16 years; maximum serum creatinine (mg/dL): male 1.7; female 1.4Xx_NEWLINE_xXCreatinine clearance or radioisotope glomerular filtration rate (GFR) >= 70 ml/min/1.73 m^2 or a serum creatinine based on age/gender as follows:* Age: 1 to < 2 years; maximum serum creatinine (mg/dL): male 0.6; female 0.6* Age: 2 to < 6 years; maximum serum creatinine (mg/dL): male 0.8; female 0.8* Age: 6 to < 10 years; maximum serum creatinine (mg/dL): male 1; female 1* Age: 10 to < 13 years; maximum serum creatinine (mg/dL): male 1.2; female 1.2* Age: 13 to < 16 years; maximum serum creatinine (mg/dL): male 1.5; female 1.4* Age: >= 16 years; maximum serum creatinine (mg/dL): male 1.7; female 1.4Xx_NEWLINE_xXCreatinine clearance or radioisotope glomerular filtration rate (GFR) within 7 days prior to enrollment >= 70 ml/min/1.73 m^2 or a serum creatinine based on age/gender as follows:* Age: 1 to < 2 years; maximum serum creatinine (mg/dL): male 0.6; female 0.6* Age: 2 to < 6 years; maximum serum creatinine (mg/dL): male 0.8; female 0.8* Age: 6 to < 10 years; maximum serum creatinine (mg/dL): male 1; female 1* Age: 10 to < 13 years; maximum serum creatinine (mg/dL): male 1.2; female 1.2* Age: 13 to < 16 years; maximum serum creatinine (mg/dL): male 1.5; female 1.4* Age: >= 16 years; maximum serum creatinine (mg/dL): male 1.7; female 1.4Xx_NEWLINE_xXGENERAL INCLUSION CRITERIA FOR SUBPROTOCOLS: Creatinine clearance or radioisotope glomerular filtration rate (GFR) >= 70ml/min/1.73 m^2 or a serum creatinine based on age/gender as follows:* Age: 1 to < 2 years; maximum serum creatinine (mg/dL): male 0.6; female 0.6* Age: 2 to < 6 years; maximum serum creatinine (mg/dL): male 0.8; female 0.8* Age: 6 to < 10 years; maximum serum creatinine (mg/dL): male 1; female 1* Age: 10 to < 13 years; maximum serum creatinine (mg/dL): male 1.2; female 1.2* Age: 13 to < 16 years; maximum serum creatinine (mg/dL): male 1.5; female 1.4* Age: >= 16 years; maximum serum creatinine (mg/dL): male 1.7; female 1.4Xx_NEWLINE_xX