Nothing
hf_example = function(bl, history, t){
r_sr<-0.0000000123 - bl["Age"]/1000000*(2-(bl["Sex"]))
res<-r_sr+0*t
p<--0.3*(sum(history)+t)+0.3
res[sum(history)+t<1]<- max(-log(1-p)/(sum(history)+t), r_sr)
return(res)
}
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