{"study":"Chay 1992","Ee":1,"Ne":10,"Ec":6,"Nc":10,"blind":"Adequate blinding"}
{"study":"Rackham 1989","Ee":31,"Ne":68,"Ec":38,"Nc":65,"blind":"Adequate blinding"}
{"study":"Van Asperen 1992","Ee":16,"Ne":52,"Ec":19,"Nc":51,"blind":"Adequate blinding"}
{"study":"Croce 1995","Ee":19,"Ne":39,"Ec":17,"Nc":36,"blind":"Method unclear"}
{"study":"de Benedictis 1990","Ee":7,"Ne":34,"Ec":35,"Nc":41,"blind":"Method unclear"}
{"study":"Longo 1986","Ee":10,"Ne":18,"Ec":15,"Nc":18,"blind":"Method unclear"}
{"study":"Montoya 1988","Ee":6,"Ne":20,"Ec":14,"Nc":20,"blind":"Method unclear"}
{"study":"Mulhern 1982","Ee":6,"Ne":16,"Ec":8,"Nc":15,"blind":"Method unclear"}
{"study":"Salmon","Ee":8,"Ne":28,"Ec":16,"Nc":34,"blind":"Method unclear"}
{"study":"Spicak 1983","Ee":9,"Ne":25,"Ec":20,"Nc":25,"blind":"Method unclear"}