Social networks Social networking (online) 7 Social media 4 Article 3 Twitter 3 female 3 human 3 male 3 social network 3 Clustering 2 Female 2 Humans 2 Male 2 Sentiment analysis 2 Social network 2 United States 2 controlled study 2 major clinical study 2 social behavior 2 Academic department 1 African Continental Ancestry Group 1 Age cohorts 1 Aged 1 Aged, 80 and over 1 Agent-based model 1 Agent-based modeling 1 Agglomeration 1 Altmetrics 1 Alzheimer disease 1 Alzheimer disease and related dementia 1