1. Number of mobile subscribers worldwide hits 5 billion;GSMA,2017
2. Number of smartphone users worldwide from 2014 to 2020 (in billions);Statista,2016
3. Smartphone ownership and internet usage continues to climb in emerging economies;Poushter,2016
4. Smartphone-based biosensors: a critical review and perspectives;Roda;Trac. Trends Anal. Chem.,2016
5. Biosensors and bioelectronics on smartphone for portable biochemical detection;Zhang;Biosens. Bioelectron.,2016