000			00311nam a2200133Ia 4500
008			220613s9999||||xx |||||||||||||| ||und||
100			_aKenneth J Rothman
245		0	_aModern Epidemiology
250			_a3rd( 2008)
260			_bLippincott Williams & Wilkins
300			_a758
650			_aSPM
942			_cPARAC
999			_c9731 _d9731