In keeping with the rules of this site I shall refrain from pasting direct quotes. Since it's in Danish anyway I guess only a few here would be able to read it. Anyway, according to the
www.dr.dk news site, a Danish controller, who was alone in the ATC centre at the time of the accident, has been hospitalized with a nervous breakdown.
Also according to the news site, and this part is most likely journalistic guesswork, the controller was so caught up in getting a line through to Friedrichshafen that he "forgot" about either the Tupolev or the Boeing, or even both.
The Danish controller was on duty with a Swiss collegue, who at the time was taking a break.
I feel for the guy, even if an investigation should come to the conclusion that ATC errors was a major component of the events leading to the accident.