Question: The vocalist whose guitar work punctuated the music of Chiefs of Relief died from complications of what disease?

Context articles: All the Way from Memphis
Retroglide (album)
René Hall
Marlene VerPlanck
Matthew Ashman
Jimmie Selph
Chiefs of Relief
Buddy Boy Hawkins
Musiri Subramania Iyer
Can't You Hear Me Knocking

"All the Way from Memphis" is a single released by Mott the Hoople as the lead track from the album "Mott" in 1973.
 The song tells a story about a rock and roller whose guitar is shipped to Oriole, Kentucky instead of Memphis.
 The musician gets half-way there before he realizes his instrument is missing and takes a month to track it down.
 When he gets the guitar back, he is scolded by a stranger for being neglectful and self-centered.
 In the original version of the song, the stranger is referred to as a "spade", in later versions the word "dude" is substituted.
Retroglide (released 18 September 2006) is a studio album by the British rock/pop/fusion group Level 42.
 It was released 12 years after their previous album and reached the UK Top 80.
 It is a mix of electronica with Level 42's traditional blend of funk and pop.
 The album is notable for featuring songs written by Boon Gould, the band's original guitarist (whose guitar is featured on "Ship") and bassist/vocalist Mark King.
René Joseph Hall (September 26, 1912 ‒ February 11, 1988) was an American musician, performer, and music arranger whose guitar and arrangements can be heard on hundreds of enduring rock and roll and R&B recordings released by many of America's most notable labels including Aladdin, Decca, Motown, and RCA Records.
 His best-known recording was the instrumental "Twitchy", which featured a single-string guitar ("Unitar") lead played by Willie Joe Duncan, the instrument's inventor.
Marlene Paula VerPlanck "(née" Pampinella; born November 11, 1933) is an American jazz and pop vocalist whose body of work centers on big band jazz, the American songbook, and cabaret.
Matthew James Ashman (3 November 1960 – 21 November 1995) was an English guitarist with Adam and the Ants and Bow Wow Wow.
 He died at age 35 after lapsing into a coma due to complications arising from diabetes in 1995.
Jimmie Selph (June 23, 1915 – December 28, 2000), born James Coin Self, was a versatile American country music, rockabilly and bluegrass musician and occasional vocalist whose career peaked during the late 1940s–1950s.
 He played guitar, drums, accordion, and steel guitar.
 His names are occasionally seen professionally as variously Jimmy and/or Self.
Chiefs of Relief were a British rock group with a unique electro-punk style, punctuated by the guitar work of vocalist Matthew Ashman, and also featuring drummer Paul Cook.
 The Chiefs fused rock with hip hop and electronic elements from the era but it was as a live outfit that they excelled.
Walter "Buddy Boy" Hawkins was an American country blues guitarist, singer, and songwriter.
 He recorded only 12 songs, between 1927 and 1929, but Paul Oliver opined that "Hawkins was a major figure in black country music".
 AllMusic noted that he was "one of the most distinctive country-blues performers of the pre-war era, a gifted vocalist whose taste for slow, dirge-like songs was ideally suited to his intricate guitar work."
Musiri Subramania Iyer (April 9, 1899 - March 25, 1975) was a Carnatic vocalist whose stage performing career spanned the 1920s to the 1940s.
 After retirement from the stage, he remained an iconic figure in Carnatic music as a dedicated teacher and leader in the Carnatic community.
 His bhava-laden renditions of Carnatic songs have become the measuring stick for generations of Carnatic vocalists.
 Musiri Subramania Iyer is one of the giants of Carnatic music in this century.
"Can't You Hear Me Knocking" is a song by English rock band the Rolling Stones from their 1971 album "Sticky Fingers".
 The song is over seven minutes long, and begins with a Keith Richards open-G tuned guitar intro.
 At two minutes and forty-three seconds, an instrumental break begins, with Rocky Dijon on congas; tenor saxophonist Bobby Keys performs an extended saxophone solo over the guitar work of Richards and Mick Taylor, punctuated by the organ work of Billy Preston.
 At 4:40 Taylor takes over from Keys and carries the song to its finish with a lengthy guitar solo.