Tijhuis, MARde Jong-Gierveld, JFeskens, EJMKromhout, D2025-03-172025-03-171999https://rivm.openrepository.com/handle/10029/637815Changes in and factors related to loneliness in older men. The Zutphen Elderly StudyArticleAge Ageing 1999; 28:491-52025-03-17