I_EHR_CONTRIBUTION.list_all_contributions and I_EHR.list_contributions seem to be the same operation

Looking at I_EHR and I_CONTRIBUTION there are two operations to get a set of CONTRIBUTION that are basically the same, but one has a time interval filter, and the other one has pagination parameters.

I think would be simpler to have just one operation to get CONTRIBUTIONs, on either interface, and merge the current filters and pagination parameters into that operation.

As a general design criteria I would suggest to have just one operation per business goal (e.g. get CONTRIBUTIONs).