Mathematical typesetting of column heads using the latex (Hmisc) function

Dear r-helpers,

I would very much appreciate help with the following problem:

The following command (in a .Rnw file)

latex(anova(e7.lmer3, e7.lmer4), file = 'e7lmer34.tex', rowname = c 
('nonlinear', 'linear'), longtable = FALSE, dcolumn = T, booktabs =  
T, table.env = F)

produces the following output after running Sweave:

% latex.default(anova(e7.lmer1, e7.lmer2), file =  
"e7lmer12.tex",      rowname = c("nonlinear", "linear"), longtable =  
FALSE, dcolumn = T,      booktabs = T, table.env = F)
%
\newcolumntype{.}{D{.}{.}{-1}}
\begin{center}
\begin{tabular}{l.......}\toprule
\multicolumn{1}{l}{anova}&
\multicolumn{1}{c}{Df}&
\multicolumn{1}{c}{AIC}&
\multicolumn{1}{c}{BIC}&
\multicolumn{1}{c}{logLik}&
\multicolumn{1}{c}{Chisq}&
\multicolumn{1}{c}{Chi Df}&
\multicolumn{1}{c}{Pr(>Chisq)}
<snip>

I would like it to produce

\newcolumntype{.}{D{.}{.}{-1}}
\begin{center}
\begin{tabular}{l.......}\toprule
&
\multicolumn{1}{c}{d.f.}&
\multicolumn{1}{c}{\textsc{aic}}&
\multicolumn{1}{c}{\textsc{bic}}&
\multicolumn{1}{c}{$\log{(\mathcal{L})}$}&
\multicolumn{1}{c}{$\chi^{2}$}&
\multicolumn{1}{c}{\chi^{2}$ d.f.}&
\multicolumn{1}{c}{Pr($> \chi^{2}$)}
<snip>

Mathematical typesetting of column heads using the latex (Hmisc) function

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