Where to inject fat for nasolabial folds? And can fat be injected into the glabellar to decrease the fold between eyebrows?

If fat was injected to help with nasolabial folds would it be injected directly into the fold lines or would fat be injected much higher up in.the cheeks? Also can fat be injected into the glabellar to make the fold between the eyebrows less severe. Would this work? Thanks for any help. Much appreciated.