Table 1 Details of search strategy

1. (child or adolescent or infant or juvenile or pediatric or paediatric or young person or young people or youth or young adult or teen or teenager or boy or girl or schoolchild)

2. (psychology or psychotherapy or behavior therapy or cognitive or hypnosis or relaxation or mindfulness or meditation or acceptance or imagery)

3. (chronic pain or recurrent pain or persistent pain or nociceptive pain or psychogenic pain or neuropathic pain or somatic pain or pain or headache or migraine or cephalagi or neuralgi or arthritis or juvenile idiopathic arthritis or JIA or juvenile fibromyalgia syndrome or fibromyalgia or ankylosing spondylitis or juvenile spondylitis or rheumatoid arthritis or osteomyelitis or chronic pelvic pain or non-cardiac chest pain or complex regional pain syndrome or mixed pain or neuropathic pain or mixed pain or musculoskeletal pain or knee pain or back pain or low back pain or stomach ache or tummy ache or abdominal and pain or belly ache or recurrent abdominal pain or ear ache or odontalgi or myofascial and pain or orofacial pain or facial pain)

4. (Internet or Telecommunications or telemedicine or telemedicine or telehealth or tele-health or e-health or ehealth or world and wide and web or www or web-based or email or e-mail or online or social media or computer or technology software or telephone or smartphone or cellphone or mobile or mobile health or mhealth or m-health or text or app or ICT or information and communication technology or interactive or virtual reality or VR or augmented reality or AR or game based or gamification)