Table 1.  Demographic characteristics of cases           and controls
												Cases N=200															Controls N=200
	Characteristics									N								%								N							%
	Females								80								40								80							40
	Birthplace
	NYC								70								35								90							45
	USA, not NYC								50								25								80							40
	Not USA								80								40								30							15
	Mean age (SD)										36 (10)																35 (13)*