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Journal of Advanced Nursing > 79 > 9 > 3498 - 3512
International Journal of Gynecology & Obstetrics > 2016 > 133 > 1 > 53-58
BMC Public Health > 2015 > 16 > 1 > 1-11
International Journal of Cardiology > 2013 > 168 > 2 > 1201-1206