I have a dataframe with coefficients and standard errors (in parenthesis) of a regression model that looks like this:

data =  data.frame(Variable = c('x1', 'x2', 'x3'), 
           Coefficients_se1 = c('0.04 (0.03)', '', ''), 
           Coefficients_se2 = c('', '0.08*** (0.01)', ''), 
           Coefficients_se3 = c('', '', '0.02* (0.01)'))

print(data)

  Variable Coefficients_se1 Coefficients_se2 Coefficients_se3
1       x1      0.04 (0.03)                                  
2       x2                    0.08*** (0.01)                 
3       x3                                       0.02* (0.01)

I would like to know if there is a way to move the values in the parenthesis to the line above in the same dataset. This way, I would like to produce an output like above:

  Variable Coefficients_se1 Coefficients_se2 Coefficients_se3
1       x1             0.04                                  
2                    (0.03)                                  
3       x2                           0.08***                 
4                                     (0.01)                 
5       x3                                              0.02*
6                                                      (0.01)

Is it possible to do this using R ?