(a)

Study	Year	City, Country	Region	Race	RRF
Kelsey et al. [37]	1970		North America	African	2.31
				White	1.0
Bosch et al. [32]	2008	New Mexico	North America	African	4.47
				Hispanic	2.12
				Native American	2.12
				White	1.0
Lehmann et al. [31]	2006	United States	North America	African	3.94
				Hispanic	2.53
				Asian/Pacific Islanders	1.62
				White	1.0
Stott and Bidwell [29]	2003	New Zealand	Australia/NZ	New Zealand Maori	5.6
				Pacific	4.2
				White	1.0
Loder [30]	1996	Worldwide		NA/Pacific Islanders	4.5
				African	2.2
				Hispanic/Native Am	1.05
				White	1.0
				Indo-Malay	0.5
				Indo-Med	0.1

^⋀using Caucasian as a baseline frequency of 1.0.