DECLINE OF PERFLUOROOCTANOIC ACID IN HUMAN SERUM OVER TWO YEARS BEFORE AND AFTER GRANULAR ACTIVATED CARBON FILTRATION IN TWO PUBLIC WATER SUPPLIES, AND IMPLICATIONS FOR HALF-LIFE ESTIMATION Publication Attachment: 10-1594.pdf Authors: Bartell, S., Lyu, C., Ryan, B., Steenland, K. Year: 2010