Cancer(4) COVID-19(4) participant(3) Trial(3) declined(3) RCT(3) age(3) Intervention(3) concealed(2) nutrition(2) Radiotherapy(2) Randomized(2) Behavior(2) Support(2) disease stage(2) highest(2) impacted(2) physical activity(2) telehealth(2) Controlled trial(2) disease(2) intervention group(2) majority(2) eligible patient(2) Health(2) BMI(2) online questionnaire(2) measure(2) occurred(2) adherence(2)