000			01526 a2200457 4500
005			20250513175826.0
264		0	_c19990614
008			199906s 0 0 eng d
022			_a1044-3983
040			_aNLM _beng _cNLM
100	1		_aLieff, S
245	0	0	_aSelection bias and the use of controls with malformations in case-control studies of birth defects. _h[electronic resource]
260			_bEpidemiology (Cambridge, Mass.) _cMay 1999
300			_a238-41 p. _bdigital
500			_aPublication Type: Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, P.H.S.
650	0	4	_aBoston _xepidemiology
650	0	4	_aCase-Control Studies
650	0	4	_aCleft Lip _xepidemiology
650	0	4	_aCleft Palate _xepidemiology
650	0	4	_aCongenital Abnormalities _xepidemiology
650	0	4	_aEnvironmental Exposure _xadverse effects
650	0	4	_aFemale
650	0	4	_aHumans
650	0	4	_aInfant, Newborn
650	0	4	_aOntario _xepidemiology
650	0	4	_aPhiladelphia _xepidemiology
650	0	4	_aPopulation Surveillance
650	0	4	_aPregnancy
650	0	4	_aPregnancy Complications
650	0	4	_aPregnancy Trimester, First
650	0	4	_aPrevalence
650	0	4	_aResearch Design
650	0	4	_aRisk Factors
650	0	4	_aSelection Bias
650	0	4	_aSmoking _xadverse effects
700	1		_aOlshan, A F
700	1		_aWerler, M
700	1		_aSavitz, D A
700	1		_aMitchell, A A
773	0		_tEpidemiology (Cambridge, Mass.) _gvol. 10 _gno. 3 _gp. 238-41
999			_c10189843 _d10189843