gnus-secondary-select-methods and use of variables

[Cecil Westerhof]

I would like to do something like the following:
    (setq gnus-secondary-select-methods
          '(
            (nnimap "gmail"
                    (nnimap-address "imap.gmail.com")
                    (nnimap-stream ssl)
                    (nnimap-authinfo-file (symbol-value imap-authinfo-file))
                    )
            (nnimap "e-mail"
                    (nnimap-address (symbol-value imap-own-server))
                    (nnimap-stream tls)
                    (nnimap-authinfo-file (symbol-value imap-authinfo-file))
                    )
            ))

I need to use the real values. Is there a way I could use variables to
set gnus-secondary-select-methods?