In Phys.Lett. 70B (1977) 201 the first possible evidence for coherence in Bose-Einstein correlations was reported by Fowler and Weiner. Motivated by the existence, in modern field theory, of classical solutions, which are coherent states, these authors then introduced the concept of quantum coherence into Bose-Einstein correlations. A modern, quantum field theory of Bose-Einstein correlations was formulated by Andreev, Plümer and Weiner in Int. J. Mod. Phys. A 8 (1993) 4577. One of the striking consequences of this theory is the prediction of particle-antiparticle correlations.