00374nas a2200121   4500000000100000008004100001100001700042700001500059245015400074300001100228490000700239050000600246       2007                            d1 aJoshi Rohina1 aCardona M.00aThe challenge of balancing methodological research rigour and practical needs in low-income settings: what are we doing and what we need to do better  a81-89.0 v17  aY