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1
0003-4819-159-8-201310150-00709
0003-4819-159-8-201310150-00709
http://dx.doi.org/10.7326/0003-4819-159-8-201310150-00709
Randomized trials analyzed as observational studies.
P356
Q37387434-01B079AC-D63E-4E0A-9884-A13C6EDF9D62
P356
0003-4819-159-8-201310150-00709
http://dx.doi.org/10.7326/0003-4819-159-8-201310150-00709