00366nas a2200133   4500000000100000008004100001100001400042700001600056700001400072245011300086300001200199490000700211020001400218       2011                            d1 aBauman A.1 aCui Zhaohui1 aDibley M.00aTemporal trends and correlates of passive commuting to and from school in children from 9 provinces in China  a423-4270 v52  a0091-7435