From Airports:

Brussels International Airport (BRU)

Taxi from outside the Airport Terminal takes approximately 25 minutes

Or

From the Airport terminal a train to Gare de Midi/Zuid
(If taking the train you will then take a taxi for ten minutes to the Clinic)

Charleroi Airport (CRL) Approximately 1 hour to central Brussels

A regular coach service from the Airport to Gare de Midi/Zuid takes just over one hour and then a short taxi drive. To see the time table of the coaches copy and paste the link below:
http://www.charleroi-airport.com/doc.ph ... ite=1&lg=2

From Train Terminals:

Eurostar from the UK and Thayls from many other European Cities

Directly into Gare de Midi/Zuid and then a 10 minute taxi to the Clinic