“…Originally developed to identify what kinds of items might be purchased together in a supermarket, the association rule mining module had been successfully applied to determine the co-prescription patterns of CHP for certain diseases in previous reports (Feng et al, 2006;Kung et al, 2006;Chen et al, 2008a;Hsieh et al, 2008). Details of the computing algorithm were described in a previous study (Chen et al, 2003b(Chen et al, , 2008aKung et al, 2006;Jong et al, 2010).…”