Author	Study concept and design	Acquisition of data	Analysis and interpretation	Drafting manuscript	Critical revisions	Statistical analysis	Obtaining funding
Lewis	X	X	X	X	X		X
Sandler	X		X		X		X
Brotherton	X		X		X
Brensinger			X		X	X
Li			X		X	X
Kappelman	X		X		X		X
Daniel			X		X	X
Bittinger			X		X	X
Albenberg	X		X		X
Valentine	X	X	X		X
Hanson	X	X	X		X
Suskind	X		X		X
Meyer	X		X		X
Compher	X		X		X
Bewtra		X	X		X
Saxena		X	X		X
Dobes	X				X		X
Cohen		X			X
Flynn		X			X
Fischer		X			X
Saha		X			X
Swaminath		X			X
Yacyshyn		X			X
Scherl		X			X
Horst		X			X
Curtis	X		X		X
Braly	X				X
Nessel	X		X		X
McCauley			X		X
McKeever			X		X	X
Herfarth	X		X		X