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\textit{Oh, an empty article!}  You can get started by \textbf{double clicking} this text block \section{Dementia  and begin editing. You can also click Alzheimer's Disease}  Dementia is a progressive decline of cognitive functions of the human brain associated with gradual death of neurons.  Prominent symptoms of dementia are loss of memory, mood changes, and problems with communication and reasoning.  Alzheimer's disease (AD) is  the \textbf{Text} button below most common form of dementia contributing  to add new block elements. Or you $60-70\%$ of cases \cite{who2015}.  It primarily affects the ageing population and the risk increases with age.  The increment of longevity in most parts of the world due to the advancement of medical science and consequently better health care  can \textbf{drag cause a significant rise in the incidence of AD in coming years.  The number of people with AD is predicted to be SOME NUMBER \cite{SOME_PAPER} by SOME DATE  and drop an image} right onto this text. Happy writing! the health care cost of AD is predicted to be around SOME NUMBER by SOME DATA \cite{SOME_PAPER}.  The exact mechanisms of AD is not well known.  It is imperative to improve our understanding of AD to alleviate the growing socio-economic impact of AD in the world.