Recruitment {15}
NH will be recruited using a list of homes within 100 km of the trial centre in each country. The trial centre will prepare letters and information packages including guidance on the eligibility criteria and requirements for study participation. The director of care/site administrator or equivalent is the primary recipient of the initial information. One week after the first contact, the trial centre will follow up the contact and explain the study and address any questions. If the site is interested in participating, a visit will be arranged. Study team members will visit the site to provide further information about the study and answer questions. An agreement will be initiated and the site, subject to any required internal approval mechanism, will give written consent to be part of the study. Should further clarification or internal consultation be required, a follow-up telephone call not later than 1 week following the visit can be conducted. Following consent of the site and a written agreement, the site can be enrolled into the study by trial research staff. Care units will be randomly allocated from amongst the general clinical units in each home. Residents will be recruited following the identification of potential participants by unit staff. Caregivers will be recruited by the researchers from the participating care units.