On strongly coupled quenched QED4, again: chiral symmetry breaking,   Goldstone mechanism and the nature of the continuum limit
  We explore the possibility of a trivial continuum limit of strongly coupled quenched QED4 by contrasting our results with a Nambu--Jona Lasinio equation of state. The data does not compare favorably with such scenario. We study in detail the interplay of chiral symmetry breaking with the Goldstone mechanism, and clarify some puzzling features of past results. 
M-P Lombardo A. Kocic and J. B. Kogut