by (United Kingdom)R.L.Purdy; (United States)Editorial Department of ABP; by (United Kingdom)R.C.Holland; (United States)Editorial Department of DAD; by (United Kingdom)R.B.Coats; (United States)Editorial Department of MPM; by (United Kingdom)N.Willis; (United States)Editorial Department of HH; by (United Kingdom)P.Hanks; (United States)Editorial Department of IHD by (United Kingdom)C.A.Coulson; (United States)Editorial Department of ACS; by (United Kingdom)A.Warner; (United States)Editorial Department of WBSB; by (United Kingdom)A.Room; (United States)Editorial Department of RHC; by (United Kingdom)S.Money; (United States)Editorial Department of MPH; by (United Kingdom)F.P.Besag; (United States)Editorial Department of CIND;