Stakeholders’ views and experiences of care and interventions for addressing frailty and pre-frailty: A meta-synthesis of qualitative evidence - D’Avanzo, Barbara; Rachel Shaw; Silvia Riva; Apóstolo, João; Bobrowicz-Campos, E.; Donata Kurpas; Maria Bujnowska; Holland, Carol (PLOS ONE, 2017)