Extension or cancellation of doctoral-course enrolments DoctorateIt is mandatory for doctoral students on UdG programmes or joint programmes coordinated by the UdG who began their studies in 2017-2018 to pass two compulsory training course credits during their doctoral studies.Enrolment on these courses is carried out exclusively through the online enrolment application. Enrolment extensions or cancellations may be requested for justified reasons and within the established deadlines.