Key points are not available for this paper at this time.
Freire PCC, Wex N, Esposito-Farèse G, et al. The relativistic pulsar-white dwarf binary PSR J1738+0333 - II. The most stringent test of scalar-tensor gravity. Monthly Notices of the Royal Astronomical Society. 2012;423(4):3328-3343.
Freire et al. (Fri,) studied this question.