aBioengineering & Chronobiology Laboratories, Atlantic Research Center for Telecommunication Technologies (atlanTTic), Universidade de Vigo

bBioengineering & Chronobiology Research Group, Galicia Sur Health Research Institute (IIS Galicia Sur), SERGAS-UVIGO, Vigo, Spain

cDepartment of Biomedical Engineering, Cockrell School of Engineering, The University of Texas at Austin, Austin

dDepartment of Internal Medicine, McGovern School of Medicine, The University of Texas Health Science Center at Houston, Houston, Texas, USA

Correspondence to Prof. Ramón C. Hermida, PhD, FASH, FAHA, AIMBE Fellow. Director, Bioengineering & Chronobiology Labs, Atlantic Research Center for Telecommunication Technologies (atlanTTic), E.I. Telecomunicación, Campus Universitario, Vigo (Pontevedra) 36310, Spain. Tel: +34 986 812148; e-mail: [email protected]