Greek to English Medical General / Conversation / Greetings / Letters

This appears as a heading in a postgraduate pharmaceutical degree transcript, in the detailed marks section listing the subject modules. In the column under this heading, the entry for each individual subject is 0.0. At the bottom of this section, there is also an entry for the total of Δ.Μ.s (also 0.0). I would guess it means something like did not attend, but this is pure guesswork. I have not been able to find the abbreviation anywhere. Any help gratefully received!