I wish science had an answer for you, but unfortunately we do not.
The monozygotic and dizygotic concordance of this disease are 50-80% and 25-35% respectively. In simple language this means if your identical twin (monozygotic, or meaning you share the same genetic map) had ADHD , still there is only 50% chance that you might have ADHD. This means there are more than genetic influences, which could include the risks from the environment.
So in simple terms: this is work under a lot of research at this time, and we don't know what causes ADHD, but there is a heavy influence of genetics in this.
Uncertain etiology means the cause is unknown.
Pseudomonas is a bacterium. It doesn't have an etiology; it is an etiology. It can cause skin infections, UTIs, and other illnesses.
Etiology is what causes a disease or how it occurs based on studies
Staphylococcus is a bacterium. It doesn't have an etiology, it is an etiology for infections including boils, folliculitis, some UTIs, and impetigo.
Infective etiology (or infectious etiology) in chest x-ray is an detailed examination of how the disease has spread in the patient's chest.
Etiology refers to the course of a disease. What that means is that it is the history of the progression and development of it. Some conditions have a common etiology because they develop the same way. For example, a cold and a flu; they start out the same, but then change their etiology once they develop more.
The etiology of many diseases such as the cancer is still being researched.
etiology is the study of the origin of diseases.
Pan sinusitis
Mania
The etiology of marfan syndrome would be the mutations in the protein FBN1 in the gene chromosome 15.
Etiology is the study of causes. So I am unsure what you are looking for due to the fact that this is not a disorder or a disease.