Regular expression query

[rahulrasal at gmail.com]

Hi All,

I have a string which looks like

aaaaa,bbbbb,ccccc "4873898374", ddddd, eeeeee "3343,23,23,5,,5,45", fffff "5546,3434,345,34,34,5,34,543,7"

It is comma saperated string, but some of the fields have a double quoted string as part of it (and that double quoted string can have commas).
Above string have only 6 fields. First is aaaaa, second is bbbbb and last is fffff "5546,3434,345,34,34,5,34,543,7".
How can I split this string in its fields using regular expression ? or even if there is any other way to do this, please speak out.

Thanks in advance