1. Robinson GC. The patient as a person. New York: Commonwealth Fund; 1939.
2. Tononi G. Phi: a voyage from the brain to the soul. New York: Pantheon Books; 2012.
3. Grigolini P, Piccinini N, Svenkeson A, Pramukkul P, Lambert D, West BJ. From neural and social cooperation to the global emergence of cognition. Front Bioeng Biotechnol. 2015;13:78.
4. McDougall W. The group mind. 2nd ed. New York: Putnam; 1928.
5. Singer W. The brain: an orchestra without a conductor. Max Planck Res. 2005;3:14.