Biohybrid actuators for robotics: A review of devices actuated by living cells. - Ricotti, Leonardo; Trimmer, Barry; Feinberg, Adam W.; Raman, Ritu; Parker, Kevin K.; Bashir, Rashid; Sitti, Metin; Martel, Sylvain; Dario, Paolo; Menciassi, Arianna (Science Robotics, 2017)