how to extract sargan pvalue from xtdpdsys command

[Joao Macosso]

How can I extract the sargan p value from xtdpdsys command
when I check in

 eret list

I see e(sargan) but nothing like sargan pvalue, but I am able to print the value when running estate sargan.

xtdpdsys lnNRR lnOpen if Year>208, lags(1) artests(2)

estat sargan
Sargan test of overidentifying restrictions
H0: Overidentifying restrictions are valid

chi2(153)    =  207.3151
Prob > chi2  =    0.0023

. eret list

scalars:
e(rank) =  3
e(sig2) =  .0963451590472303
e(rss) =  28.32547675988571
e(N) =  150
e(N_g) =  15
e(g_min) =  10
e(g_max) =  10
e(g_avg) =  10
e(t_min) =  1996
e(t_max) =  2018
e(chi2) =  550.7942281140204
e(df_m) =  2
e(zrank) =  156
e(artests) =  0
e(sargan) =  207.3151204592509

macros:
e(cmdline) : "xtdpdsys lnNRR lnOpen if Year>2008, lags(1)    artests(2)"
e(cmd) : "xtdpdsys"
e(estat_cmd) : "xtdpd_estat"
e(marginsok) : "XB default"
e(predict) : "xtdpd_p"
e(depvar) : "lnNRR"
e(transform) : "difference"
e(tvar) : "Year"
e(ivar) : "id"
e(datasignaturevars) : "lnNRR L.lnNRR lnOpen"
e(datasignature) : "345:47(71867):1803732423:3311762091"
e(system) : "system"
e(vce) : "gmm"
e(properties) : "b V"

matrices:
e(b) :  1 x 3
e(V) :  3 x 3

functions:
e(sample)

[George Ford]

looks like you'll have to compute it.

di chi2tail(153,207.3151)
di chi2tail(e(zrank)-e(rank),e(sargan))