confusion

I saw the following passage in The Australian and got totally confused.

SYDNEY University is set to focus its health and medical research on four priority health and medical priority areas which will attract the lions share of resources and support over the next decade.

The four pillars will be obesity, diabetes and cardiovascular disease, cancer, mental health and neuroscience and infectious diseases.

So, what exactly are the four pillars to which the journalist is referring to? It's quite ambiguous. Let's see...

1. obesity

2. diabetes and cardiovascular disease

3. cancer

4. mental health and neuroscience

5. infectious diseases (hang on, that's five)

Ok. Try again:

1. obesity

2. diabetes and cardiovascular disease

3. cancer

4. mental health 

5. neuroscience and infectious diseases (nope, still five)

Aha...

1. obesity, diabetes and cardiovascular disease

2. cancer

3. mental health and neuroscience

4. infectious diseases