00343nas a2200121   4500000000100000008004100001100001600042700001500058700002300073700002100096245009800117300000600215       2012                            d1 aFerreira P.1 aMachado G.1 aM. Pinheiro Barros1 aFerreira Manuela00aIs alcohol intake associated with low back pain? A systematic review of observational studies  a8