Table 1. Spaceflight experience of study subjects.

Summary of spaceflight missions (launch and landing dates) as well as durations for study subjects TW and HR.

Subject	Vehicle	Mission	Launch date	Landing date	Duration (days)
TW	Space shuttle	STS-103	12/19/99	12/27/9 9	8
	Space shuttle	STS-118	8/8/07	8/21/07	12.7
	International Space Station	Expedition 25/26	10/7/10	3/16/11	159
	International Space Station	Expedition 43/44/45/46	3/27/15	3/1/16	340
HR	Space shuttle	STS-108	12/5/01	12/17/01	11.8
	Space shuttle	STS-121	7/4/06	7/17/06	12.8
	Space shuttle	STS-124	5/31/14	6/14/14	13.8
	Space shuttle	STS-134	5/16/11	6/1/11	15.7