Table 1. Period lengths obtained from subjects by physiological measurements and from fibroblast molecular analyses.

Subject location	N	τ in vitro	τ in vitro	r2
Basel	9	24.00±0.33	24.71±0.38	0.46
		(23.60–24.50)	(24.15–25.29)
Novosibirsk	11	24.07±0.20	24.77±0.42	0.68
		(23.71–24.31)	(24.10–25.45)
Guildford	8	24.52±0.27	24.46±0.48	0.66
		(24.13–24.92)	(23.80–25.23)