00417nas a2200097   4500000000100000008004100001100001600042245024700058300000700305490000700312       2020                            d1 aT Usherwood00aQUality improvement in primary care to prevent hospitalisations and improve Effectiveness and efficiency of care for people Living with coronary heart disease (QUEL): Protocol for a 24-month cluster randomised controlled trial in primary care  a360 v21