Salisbury, C., Thomas, C., O'Cathain, A., Rogers, A. E., Pope, C., Yardley, L., …Montgomery, A. A. (in press). TElehealth in CHronic disease: mixed-methods study to develop the TECH conceptual model for intervention design and evaluation. BMJ Open, 5(2), Article e006448. https://doi.org/10.1136/bmjopen-2014-006448