LONDON, England, April 3 -- BMJ Open, a medical journal that says it features research questions in clinical medicine, public health and epidemiology, published research articles, including the following topics, in its April 2021 edition:

* Cross-sectional study evaluating the association between integrated care and health-related quality of life (HRQOL) in Dutch primary car

* Erector spinae plane block for minimally invasive mitral valve surgery: a double-blind, prospe . . .

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