MESA (kinematics in the first column and experimental precision in the second column) on the theoretical uncertainty of the TPE contribution to the Lamb shift in muonic deuterium (third column) and the ($1S-2S$) splitting in electronic deuterium (fourth column).[]{data-label="tab3"}

   Contribution   This work    [@pachuckiD]   [@Friar:2013rha]   [@Ji:2013oba]   [@rosenfelder]   [@martynenkofaustov]
  -------------- ------------ -------------- ------------------ --------------- ---------------- ----------------------
     Elastic       0.394(2)         –                –                 –               –                  0.37
     Hadronic      0.028(2)       0.043              –                 –               –                   –
     Nuclear      1.589(740)    1.637(16)            –                 –              1.5                  –
      Total       2.011(740)    1.680(16)          1.942             1.698             –                   –

  : Nuclear and nucleon structure-dependent ${\cal{O}}(\alpha^5)$ contributions to the $2P-2S$ Lamb shift in muonic deuterium as calculated by different groups, in units of meV. In case of Refs. [@pachuckiD; @Friar:2013rha; @Ji:2013oba] the separation of the result into “elastic" and “nuclear" contributions is not possible, and the sum of the two is quoted. []{data-label="tab4"}

Our result should be compared to those obtained by other groups: [@pachuckiD; @martynenkofaustov; @Borie:2012zz; @rosenfelder; @krutov; @friar; @Friar:2013rha; @Ji:2013oba]. Note that [@martynenkofaustov; @Borie:2012zz; @krutov] did not perform a complete calculation and take, for instance, the nuclear polarizability correction from other works. To facilitate the comparison, we list our results along with those obtained by other groups in Table \[tab4\]. To make a sensible comparison possible 