Table 2.

Source of contact information for persons enrolled in the GuLF STUDY 2011–2013.

Source lista,b	Number enrolled (32,608)	Proportion doing clean-up work (77%)
PEC training list	22,467	72
NIOSH roster	1,142	84
Vessels of opportunity (VOO)	267	89
U.S. Coast Guard	2,992	74
TRG badging data	3,417	94
U.S. and Florida Fish & Wildlife	671	97
Other federal agencyc	720	86
Rig workers from POB and THR lists	139	95
Heliport recruitment	128	92
Other	665	86
Abbreviations: POB, persons on board; THR, time history report. aHierarchical listing in order shown to eliminate inclusion of workers on more than one list. bSee Appendix 1 for definitions. cNational Oceanic and Atmospheric Administration, Agency for Toxic Substances and Disease Registry, U.S. Geological Survey, Department of the Interior.