Erythrocyte Protoporphyrin System Internationale Reference Intervals (All Ages): (methodology)
   Black (African-American) Female Reference Interval
   Black (African-American) Male Reference Interval
   Hispanic (Mexican-American) Female Reference Interval
   Hispanic (Mexican-American) Male Reference Interval
   White Female Reference Interval
   White Male Reference Interval

Erythrocyte Protoporphyrin US Conversion Reference Intervals (All Ages): (methodology)
   Black (African-American) Female Reference Interval*
   Black (African-American) Male Reference Interval*
   Hispanic (Mexican-American) Female Reference Interval*
   Hispanic (Mexican-American) Male Reference Interval*
   White Female Reference Interval*
   White Male Reference Interval*

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