Society for Pediatric and Perinatal Epidemiologic Research (SPER) 34th Annual Meeting Abstracts 2021 Virtual Conference
1988 ◽
Vol 128
(4)
◽
pp. 884-947
1978 ◽
Vol 108
(3)
◽
pp. 224-248
1974 ◽
Vol 100
(6)
◽
pp. 507-536
2020 ◽
Vol 189
(10)
◽
pp. 1026-1029
◽
2009 ◽
Vol 169
(Supplement 11)
◽
pp. S1-S131
◽
2021 ◽
Vol 12
(1)
◽