Show HN: A sample chapter of my book about ALS research

I am not a scientist, not even an English native speaker, but a few years ago I wrote a book about the state of research on a motor neuron disease: ALS (aka Lou Gehrig's disease). I would deeply appreciate any comment or advice on a sample chapter of this book. This sample chapter (45 pages) deals with current efforts on replacing or healing motor neurons. It is available here: https://padiracinnovation.org/en/ALS/ALS_FSTDTRMF-v32_en_partial.pdf Thanks!