00452nas a2200097   4500000000100000008004100001100003800042245025700080300001100337490000600348       1999                            d1 aProspective Studies Collaboration00aCollaborative overview ("meta-anaysis")  of prospective observational studies of the association of usual blood pressue and usual cholesterol levels with the common causes of death: protocol for the second cycle of the Prospective Studies Collaboration  a315-200 v6