Constraining chameleon models with cosmology
  Chameleon fields may modify gravity on cluster scales while recovering
general relativity locally. This article reviews signatures of chameleon
modifications in the nonlinear cosmological structure, comparing different
techniques to model them, summarising the current state of observational
constraints, and concluding with an outlook on prospective constraints from
future observations and applications of the analytic tools developed in the
process to more general scalar-tensor theories. Particular focus is given to
the Hu-Sawicki and designer models of f(R) gravity.
