First air them outside on a warm sunny day. Then try some mesh bags of Zeolites in the chest or hanging in the closet with the clothes. http://en.wikipedia.org/wiki/Zeolite
It may take a while. The deodorizing properties can be “recharged” by placing the bags in the sun for a day.
Here is a supplier.http://www.refreshinglyfree.com/Zeolite-1-pound-Bag?sc=2&category=17432