C
C There are a total of 1 entries in the algebraic variable array.
C There are a total of 5 entries in each of the rate and state variable arrays.
C There are a total of 15 entries in the constant variable array.
C
C
C VOI is time in component environment (day).
C CONSTS(1) is lambda in component uninfected (per_ml_day).
C CONSTS(2) is d_T in component uninfected (per_day).
C CONSTS(3) is efficacy in component drug_efficacy (dimensionless).
C CONSTS(4) is k in component uninfected (ml_per_day).
C STATES(1) is V in component viral_load (per_ml).
C STATES(2) is T in component uninfected (per_ml).
C CONSTS(5) is eta in component latently_infected (dimensionless).
C CONSTS(6) is d_0 in component latently_infected (per_day).
C ALGBRC(1) is f in component activated (dimensionless).
C CONSTS(7) is a in component latently_infected (per_day).
C CONSTS(8) is rho in component latently_infected (per_day).
C STATES(3) is L_a in component activated (per_ml).
C STATES(4) is L_0 in component latently_infected (per_ml).
C CONSTS(9) is p in component activated (per_day).
C CONSTS(10) is a_L in component activated (per_day).
C CONSTS(11) is T_off in component activated (day).
C CONSTS(12) is T_on in component activated (day).
C CONSTS(13) is delta in component productively_infected (per_day).
C STATES(5) is T_star in component productively_infected (per_ml).
C CONSTS(14) is p_v in component viral_load (per_day).
C CONSTS(15) is c in component viral_load (per_day).
C RATES(2) is d/dt T in component uninfected (per_ml).
C RATES(4) is d/dt L_0 in component latently_infected (per_ml).
C RATES(3) is d/dt L_a in component activated (per_ml).
C RATES(5) is d/dt T_star in component productively_infected (per_ml).
C RATES(1) is d/dt V in component viral_load (per_ml).
C
      SUBROUTINE initConsts(CONSTS, RATES, STATES)
      REAL CONSTS(*), RATES(*), STATES(*)
      CONSTS(1) = 1E4
      CONSTS(2) = 0.01
      CONSTS(3) = 0.85
      CONSTS(4) = 2.4E-8
      STATES(1) = 50
      STATES(2) = 600000
      CONSTS(5) = 0.001
      CONSTS(6) = 0.001
      CONSTS(7) = 0.03
      CONSTS(8) = 0.01
      STATES(3) = 0
      STATES(4) = 2
      CONSTS(9) = 1.4
      CONSTS(10) = 0.1
      CONSTS(11) = 54
      CONSTS(12) = 50
      CONSTS(13) = 1
      STATES(5) = 0.3
      CONSTS(14) = 2000
      CONSTS(15) = 23
      RETURN
      END
      SUBROUTINE computeRates(VOI, CONSTS,  RATES, STATES, ALGBRC)
      REAL VOI, CONSTS(*), RATES(*), STATES(*), ALGBRC(*)
      RATES(2) = (CONSTS(1) -  CONSTS(2)*STATES(2)) -  (1.00000 - CONSTS(3))*CONSTS(4)*STATES(1)*STATES(2)
      RATES(5) = ( (1.00000 - CONSTS(5))*(1.00000 - CONSTS(3))*CONSTS(4)*STATES(1)*STATES(2) -  1.00000*CONSTS(13)*STATES(5)*STATES(5))+ CONSTS(10)*STATES(3)
      RATES(1) =  CONSTS(14)*STATES(5) -  CONSTS(15)*STATES(1)
      ALGBRC(1) = TERNRY(CONSTS(11).LT.VOI, 0.00000, TERNRY(VOI.LT.CONSTS(12), 0.00000, 1.00000)
      RATES(4) = (( CONSTS(5)*(1.00000 - CONSTS(3))*CONSTS(4)*STATES(1)*STATES(2) -  CONSTS(6)*STATES(4)) -  ALGBRC(1)*CONSTS(7)*STATES(4))+ (1.00000 - ALGBRC(1))*CONSTS(8)*STATES(3)
      RATES(3) = ( ALGBRC(1)*( CONSTS(7)*STATES(4)+ CONSTS(9)*STATES(3)) -  (1.00000 - ALGBRC(1))*(CONSTS(7)+CONSTS(8))*STATES(3)) -  CONSTS(10)*STATES(3)
      RETURN
      END
      SUBROUTINE computeVariables(VOI, CONSTS, RATES, STATES, ALGBRC)
      REAL VOI, CONSTS(*), RATES(*), STATES(*), ALGBRC(*)
      ALGBRC(1) = TERNRY(CONSTS(11).LT.VOI, 0.00000, TERNRY(VOI.LT.CONSTS(12), 0.00000, 1.00000)
      RETURN
      END
      REAL FUNCTION TERNRY(TEST, VALA, VALB)
      LOGICAL TEST
      REAL VALA, VALB
      IF (TEST) THEN
        TERNRY = VALA
      ELSE
        TERNRY = VALB
      ENDIF
      RETURN
      END