00333nas a2200157   4500000000100000008004100001100001400042700001600056700001400072700001300086700001500099245003300114300001500147490000700162050000600169       2004                            d1 aWalker N.1 aBirchall N.1 aRodgers A1 aNorton R1 aMacmahon S00aPregnancy and leg ulceration  a13. [IF 0]0 v20  aY