Behavioural intention Acceptance 2 Action planning &amp 1 Cloud computing 1 Coping planning 1 Electronic word of mouth (e-WOM) 1 Gen Y 1 Health Action Process Approach (HAPA) 1 Online reviews 1 PLS-SEM 1 Perceive usefulness 1 Perceived ease of use 1 Physical activity 1 Privacy concerns 1 Public sector 1 Self-efficacy 1 Social networking 1 Theory of technology 1 Total knee arthroplasty 1 TripAdvisor 1 Trust 1 UTAUT 1