% latex table generated in R 3.4.1 by xtable 1.8-2 package
% Tue Jan 29 18:01:27 2019
  \hline
S1 & 63 & 15 & \citet{graham2018budget} \\ 
  P1/S2 & 1,624 & 170 & \citet{skinner2018healthcare} \\ 
  P2 & 1,287 & 134 & \citet{skinner2018healthcare} \\ 
   \hline
