Strategic multimodal intervention in at-risk elderly Indians for prevention of dementia (SMRUTHI INDIA): a cohort multiple randomised controlled trial (cmRCT) protocol by Pooja Sharma, Divyani Garg, Maroof Ahmad Khan, Ayush Agarwal, Manish Barvaliya, Shubham Gupta, Alex Rebello, Ashima Nehra, Anu Gupta, Padma Srivastava, Kritika Sharma, Subrata Baidya, Abhik Sinha, Shampa Das, Sunil Kumar Raina, Sakshi Sharma, Venugopalan Y Vishnu, Varuna Sharma, Subarna Roy, P K Anand, Nilima Nilima, Vaibhav Patil, Rajeev Aggarwal, Aditi Dubey, Hina Narzari, Sneha Sneha, Kamini Kashyap, Krishan Kaushal, Kajal Fulara, Shikha Chaudhary, Divya M R, Vasundhara Misra, Phaniraj Vastrad, Priyadarshanraj N, Sandesh J R, Harshath Ajay V, Aishwarya Bhovi, Mailrappa Padiyappa Hooli, Sagar P M, Ambika Y V, Ripanjit Singh, Naveen M R, Shilpa K, Sharanabasavaraj Devaramani, Sandip Bhattacharjee, Bishakha Sen, Shalina Jamatia, Manish Acharjee, Dipankar Deb, Pameli Jamatia, Munmun Debbarma, Shaily Bhushan, Rishabh Gautam, Rishav Bhatia, Arnav Verma, Kalpna Sharma, Gajraj Singh, Priyanka Kumari Meena, Akhilesh Nagar, Hitesh Tiwari, Tinku Yogi, Vikram Raigar, Vinny Wilson, Shradha Singh, Zubia Nasir, Daksha Kumari, Mallamma Duddagi, Basamma R Alur, Sreetama Bahaduri, Aditya Choudhary, Suhas Murali, Jyoti Kattna, Amita Sengupta, Dolan Roy, Tithi Patra, Bandana Kayestha, Yachana Sharma, Nandini Rawat, Kavita Bairwa, Muskan Sharma, Divyani Rathore