They are very touched by all the hartwarming messages, letters, drawings, flowers for the birth of prinses Ariane and her being sick, a little time ago.
They were very worried by that and thank all the doctors and nurses at the hospital for taking so good care and acting so quick and proffesional. And than they thank the dutch people again for their kind messages/flowers etc. during the time Ariane was (very) sick.
They are very happy Ariane was healthy again within a short time and thrilled to take her home to their family.
This is the main message. Not exactly translated, but a short conclusion.