Disclosed are hyaluronic acid compositions including crosslinked, water-insoluble, hydrated HA gel particles. The method includes detecting and translating a first sub-gesture into a first device input that defines a given reference associated with a portion of displayed visual content. Also described are methods of making the cells and using the cells in therapeutic vaccines. Using these methods, fundamental properties of the spin environment such as the correlation times and the coupling strengths for both electronic and nuclear spins in the spin bath, can be determined.