structure(list(treatment = structure(c(1L, 1L, 1L, 1L, 1L, 1L, 
1L, 1L, 1L, 1L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L), .Label = c("A", 
"B"), class = "factor"), study = c(1L, 2L, 3L, 4L, 5L, 6L, 7L, 
8L, 9L, 10L, 1L, 2L, 3L, 4L, 5L, 6L, 7L, 8L, 9L, 10L, 2L), responders = c(113L, 
1L, 24L, 248L, 31L, 65L, 3L, 28L, 177L, 2L, 111L, 5L, 20L, 269L, 
28L, 48L, 1L, 39L, 174L, 1L, 3L), exposure = c(1917, 43.6, 393.5, 
4715, 715, 885, 87.8, 1011, 1544, 125, 1925, 41.3, 373.9, 4823, 
751, 895, 91, 939, 1588, 123, 38)), .Names = c("treatment", "study", 
"responders", "exposure"), row.names = c(1L, 2L, 3L, 4L, 5L, 
6L, 7L, 8L, 9L, 10L, 11L, 12L, 13L, 14L, 15L, 16L, 17L, 18L, 
19L, 20L, 22L), class = "data.frame")
