Promptly will keep personal data only for the period necessary for the purposes identified, namely, as long as the user's login remains active and the purposes for which it was collected remain; and may only be retained for longer periods, provided that they are processed solely for the purpose of scientific research or for statistical purposes, subject to the application of appropriate technical and organizational measures, in order to safeguard the rights and freedoms of the data subject. Such measures may include pseudonymization, provided that the aims are achieved in that way. Where those purposes may be affected by new processing which does not allow or no longer permits the identification of data subjects, the said ends are thereby achieved.