In order to be able to inform you about the PDA independently of this homepage, we will give you a collection of scientific articles and specialised texts for you and supplement them regularly.
On the homepage of the Tierklinik Haar – veterinary clinic for small animals – you will find a very detailed chapter on the PDA:
Also on the homepage of Dr. med. Vet. Killich (CC cardiologist), there is a very good overview about the PDA: