00370nas a2200157   4500000000100000008004100001100001000042700001300052700001200065700001200077700001200089700001100101245008300112300001000195490000700205       2002                            d1 aLo S.1 aJones A.1 aDean E.1 aChan K.1 aChan R.1 aCan R.00aSpirometry assessment of pulmonary function in roadside vendors: a pilot study  a10-150 v20